{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T22:20:04Z","timestamp":1791411604248,"version":"4.3.3"},"reference-count":17,"publisher":"SAGE Publications","issue":"2","license":[{"start":{"date-parts":[[2017,10,5]],"date-time":"2017-10-05T00:00:00Z","timestamp":1507161600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Global Spine Journal"],"published-print":{"date-parts":[[2018,4]]},"abstract":"<jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Retrospective cohort study.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objective:<\/jats:title>\n                    <jats:p>To determine whether a low-density (LD) screw construct can achieve curve correction similar to a high-density (HD) construct in adolescent scoliosis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Patients treated operatively for idiopathic scoliosis between 2007 and 2011 were identified through a database review. A consistent LD screw construct was used. Radiographic assessment included percent correction of major and fractional lumbar curves, T5-T12 kyphosis, and angle of lowest instrumented vertebra (LIV). Costs were compared with HD constructs.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Thirty-five patients were included in the analysis. Ages ranged from 12 to 19 years (mean = 14.9 years). Average screw density was 1.2 screws per level (range = 1.07-1.5 screws). Mean percent curve correction at latest follow-up: major curve, 66.9%; fractional lumbar curve, 63%. Average postoperative thoracic kyphosis: 29.5\u00b0. Mean LIV angle: 5.6\u00b0. Average construct cost was $14\u2009871 per case compared with $23\u2009840 per case if all levels had been instrumented with 2 screws, amounting to an average savings of $9000.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Our LD screw construct is among the lowest density constructs reported and achieves curve correction comparable to HD constructs at substantially lower cost.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/2192568217735507","type":"journal-article","created":{"date-parts":[[2017,10,5]],"date-time":"2017-10-05T22:36:11Z","timestamp":1507242971000},"page":"114-120","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":17,"title":["Low-Density Pedicle Screw Constructs for Adolescent Idiopathic Scoliosis: Evaluation of Effectiveness and Cost"],"prefix":"10.1177","volume":"8","author":[{"given":"Oliver O.","family":"Tannous","sequence":"first","affiliation":[{"name":"University of Maryland, Baltimore, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kelly E.","family":"Banagan","sequence":"additional","affiliation":[{"name":"University of Maryland, Baltimore, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eric J.","family":"Belin","sequence":"additional","affiliation":[{"name":"University of Maryland, Baltimore, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ehsan","family":"Jazini","sequence":"additional","affiliation":[{"name":"University of Maryland, Baltimore, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tristan B.","family":"Weir","sequence":"additional","affiliation":[{"name":"University of Maryland, Baltimore, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven C.","family":"Ludwig","sequence":"additional","affiliation":[{"name":"University of Maryland, Baltimore, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel E.","family":"Gelb","sequence":"additional","affiliation":[{"name":"University of Maryland, Baltimore, MD, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2017,10,5]]},"reference":[{"key":"bibr1-2192568217735507","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199710010-00008"},{"key":"bibr2-2192568217735507","doi-asserted-by":"publisher","DOI":"10.1097\/01.brs.0000179260.73267.f4"},{"key":"bibr3-2192568217735507","doi-asserted-by":"publisher","DOI":"10.1097\/00007632-199805010-00021"},{"key":"bibr4-2192568217735507","doi-asserted-by":"publisher","DOI":"10.2106\/00004623-199508000-00009"},{"key":"bibr5-2192568217735507","doi-asserted-by":"publisher","DOI":"10.1097\/01.brs.0000138268.12324.1a"},{"key":"bibr6-2192568217735507","doi-asserted-by":"publisher","DOI":"10.1097\/01.brs.0000240212.31241.8e"},{"key":"bibr7-2192568217735507","doi-asserted-by":"publisher","DOI":"10.1097\/01.brs.0000255030.78293.fd"},{"key":"bibr8-2192568217735507","first-page":"157","volume":"67","author":"Liljenqvist 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